摘要
采用溶胶-凝胶法制备了SiO2-WO3催化剂,并采用XRD、FT-IR、BET、TG-DTA等方法对催化剂进行表征。以苯并噻吩(BT)为模型化合物,H2O2为氧化剂,考察了催化剂的活性元素、制备方法、n(W)/n(Si)和焙烧温度对其催化氧化脱硫活性的影响。结果表明,W的引入降低了SiO2的比表面积,SiO2-WO3催化剂中W的主物相为WO3。在以W为活性组元,且n(W)/n(Si)为0.1时,500℃焙烧得到的SiO2-0.1WO3催化剂具有最好的催化脱硫活性。在模拟油20mL、催化剂SiO2-0.1WO3用量0.04g、n(H2O2)/n(S)为15.9、乙腈/模拟油体积比0.3、65℃反应60min的条件下,苯并噻吩模拟油脱硫率可达99.3%。
The SiO2-WO3 catalysts were prepared by the sol-gel method and characterized by XRD, FT IR, BET and TG-DTA. The effects of active element, preparation method, n（W）/n（Si） and calcination temperature on the desulfurization performance of SiO2-WO3 were investigated by using H2O2 as oxidant and the benzothiophene （BT） as model compound. The results showed that the introduction of W into SiO2 sample led to the decrease of its surface area. The predominant phase of W in catalyst was WO3. The SlOe WOa catalyst prepared with W as active element, calcination temperature of 500℃ and n （W）/n （Si） of 0.1 was found to have optimal desulfurization performance. With SiO2-WO3 as catalyst and under the conditions of model oil 20 mL, catalyst 0.04 g, n（Hz02）/n（S） 15.9, acetonitrile/simulant oil volume ratio 0.3, reaction temperature 65℃ and reaction time 60 min, the desulfurization ratio of BT model oil reached 99.3%.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2012年第5期750-756,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
